your questions are un-answerable ... you didn't clearly say how old your seedlings are, and yield depends on strain, method of growing, growing ability and setup, etc., etc., ... I suggest you obtain and read a good growing manual, and stick to the basics ... don't bother with all the advanced methods and suggestions ... get the Basics down, first ... and remember the old Grower's advice : "keep it simple, stupid" (K.I.S.S.) ... go here: GrowMoreWeed.com - Guides to growing cannabis weed marijuana
look down the list on the left, and download the "Mel Frank and Ed Rosenthal Growers Guide" ... it's FREE, and downloads in a Zip. file (I have scanned several books there for viruses, etc. , and so far, no bugs) ... anyway, it's an old manual, but a good one, and easy to understand ... :thumbsup: